wii induction charger battery pack

Hey ppl, I bought an energizer wii induction charger earlier this year. A few months later, I started getting a red flashinglight on the charger and the batteries wouldn't charge anymore. I got the battery packs replaced because it was still under warranty, and I still have the old battery packs.

I opened them up because they're pretty simple to dismantle (just 2 screws) and there are two unbranded AAA batteries. I was wondering if any rechargeable AAA battery can be used with it.

Also any ideas on other possible uses for this induction hardware? Check out the pics below: